'Labour was accused of betraying Brexit voters last night after senior figures pledged to fight to keep Britain tied to the EU's single market. In a fresh policy u-turn ahead of next week’s crunch Commons votes on Theresa May's Brexit plans, Labour frontbenchers yesterday tabled a string of amendments to the Government's flagship departure legislation designed to keep Britain closely linked to Brussels.

Labour sources said the amendments to the Government's EU (Withdrawal) Bill were drafted to try to make the country "adopt the Norway model" of EU membership.

But leading Brexit supporters last night rubbished the move as a fresh attempt to keep Britain tied to Brussels forever.

Senior Tory MP Jacob Rees-Mogg, chairman of the backbench European Research Group, said the Labour proposals would turn the UK into a "vassal state" forced to accept rules from Brussels without a voice in determining EU policy.

"The Norway model is the vassal state, not Brexit, and the Labour Party will need to answer to its many leave voters," Mr Rees-Mogg said.

Andrew Bridgen, another senior Tory MP, said: "Labour are betraying their own manifesto pledge, betraying the country and betraying millions of Labour voters who backed leaving the EU."

Labour's proposals were designed to toughen up an amendment passed by the House of Lords seeking to keep Britain closely tied to the EU's single market after Brexit.

MPs will vote on the Labour proposals next Tuesday, during a crunch series of Commons votes as the Government attempt to overturn passed by the House of Lords.

Many Labour MPs want Britain to remain a member of the European Economic Area (EEA) after the country quits the EU. Norway, Iceland, Liechtenstein, are all members of the EEA without being members of the EU.'